Effects of precooling on thermoregulation during subsequent exercise

Article Abstract:

Six endurance athletes were tested to determine whether precooling the body temperature in athletes before a strenuous athletic event, such as a triathlon, would decrease thermal strain during the event. The precooling did lower body temperature during subsequent exercise, but only for a limited time, and is not recommended as an athletic strategy. Retention of body heat depends on other factors besides precooling, including water temperature and length of immersion for swimmers, and amount of body fat in athletes.

Swimming, Body temperature, Triathlon

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Single muscle fiber myosin heavy chain distribution in elite female track athletes

Article Abstract:

Electrophoretic analysis of single muscle fibers from elite female athletes reveal a diverse myosin heavy chain phenotype as compared to a preponderance of hybrid fibers in untrained athletes. Research suggests that the unique difference is due to the chronic and varied training the elite female athletes received.

Science & research, Personnel administration, Analysis, Physiological aspects, Training, Exercise physiology, Muscle proteins, Women athletes

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Single-fiber MHC polymorphic expression is unaffected by sprint cycle training

Article Abstract:

An investigation examined single-fiber Myosin heavy chain (MHC) alterations in response to high-intensity, short-duration, sprint cycle training. It is reported that as little as 32 min of high-intensity sprint cycle training over 8 wk is sufficient to improve sprinting performance.

Athletes, Myosin, Skeletal muscle

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